The NSI G-90 Ground Clamp for Rigid Conduit with Flexible Wire Strap, grips on pipes between 1/2? to 1? in diameter and features a 1/2? adapter hub connected to the clamp by a flexible copper strap. The wire strap and adapter both swing 360 degrees, making alignment simple. The copper strap provides additional flexibility during grounding and helps to protect the conduit system from results of vibrations in the water system. The zinc-plated steel screws and bronze clamp body are made of economical, high-quality metals that provide durable performance in a range of applications. Use this clamp to attach ground wires from rigid conduit to water pipes in indoor environments. cULus Listed 467 for Grounding and Bonding. Stock products you can rely on.stock NSI. Features: Flexible Wire Strap - Copper strap allows for greater flexibility during grounding and helps to protect the conduit system from the results of vibrations in the water system; Rotating Hub - Bronze hub and strap rotate 360 degrees to make alignment simple, no matter the direction of your install; Range of Sizes - The G-90 Ground Clamp for Rigid Conduit fits pipes between 1/2? to 1? in diameter and the rotating bronze hub fits 1/2? rigid conduit or ground conductors; Bronze and Steel - The clamp and hub are made from bronze, while the tightening screws are made from reliable zinc-plated steel, both of which provide durable long-term use; UL Listed - The reliable NSI grounding and bonding products meet UL 467 performance standards for grounding and bonding